Device for suppressing high-frequency currents in infeed lines of an inverter

Abstract

A device for suppressing high-frequency currents in infeed lines to an inverter having a common-mode impedance. A magnetic core is configured for inductively coupling the infeed lines, wherein the current load on the common-mode impedance is minimized. A snubber impedance unit is inductively coupled to the common-mode impedance and has a frequency-dependent impedance.

1 - 7 . (canceled) 
     
     
         8 . A device for suppressing high-frequency currents in feed lines of a converter, comprising:
 a common-mode inductor with a magnetic core disposed to inductively couple the feed lines; and   a snubber impedance unit inductively coupled to said common-mode inductor and having a frequency-dependent impedance.   
     
     
         9 . The device according to  claim 8 , wherein said snubber impedance unit has one or both of at least one coil or at least one capacitor. 
     
     
         10 . The device according to  claim 8 , wherein said snubber impedance unit is configured to form a parallel resonant circuit. 
     
     
         11 . The device according to  claim 8 , wherein said snubber impedance unit is configured to form a series resonant circuit. 
     
     
         12 . The device according to  claim 8 , wherein said common-mode inductor is configured to form a winding section for each feed line and further comprises a magnetic core disposed to couple together said winding sections. 
     
     
         13 . The device according to  claim 8 , which further comprises a snubber impedance connection line inductively coupling said snubber impedance unit with said common-mode inductor. 
     
     
         14 . The device according to  claim 13 , wherein said snubber impedance connection line forms at least one conductor loop and wherein said common-mode inductor includes a magnetic core extending through said at least conductor loop.